Performance Optimized Wedge Ported 12" Enclosure American Bass Hawk Slim 12 · Single 12" Ported enclosure

A Qts of 0.713 is above the 0.707 of a flat sealed alignment, and with 8.5 mm of Xmax a sealed box runs the cone out of travel at about 210 W. A port carries the output around tuning and holds the cone nearly still there, which is what lets this driver take real power: here the slot runs 21.1 m/s in the channel and 12.9 at the mouth at 800 W, with the cone at 7.6 of its 8.5 mm. American Bass's own ported recommendation is 0.9 to 1.2 cubic feet; this box is 0.98. Tuning is chosen for in-car response rather than an anechoic curve: a vehicle adds roughly 12 dB per octave below about 45 Hz. In this cabinet that lands at 5.1 dB of in-car spread across 25 to 60 Hz.

The raked face is the seat side. A factory rear seat back leans about 20 degrees off vertical, so the cabinet sits flat against it and uses floor a square box wastes. The baffle stays vertical and fires rearward into the trunk, which acts as the acoustic extension into the cabin. This one is 12.14 inches deep at the base and 6.50 at the top, 29.00 wide and 15.5 tall.

Yes, at 31 Hz, 24 dB per octave. Below tuning a vented box stops loading the cone and excursion runs away toward DC. With the filter in place this cabinet puts the American Bass Hawk Slim 12 at 89 percent of its usable travel at the 800 W the port is sized for; without it there is no meaningful number to quote.

800 W RMS. American Bass rate the Hawk Slim 12 at 900 W RMS, but in this cabinet the port binds first: the slot is sized for 800 W, and above that the air in it passes the chuff threshold. At 800 W the cone sits at 89 percent of its usable travel with the subsonic filter in place. A dual 2 ohm coil is 4 ohms in series or 1 ohm in parallel; a dual 4 ohm is 8 series or 2 parallel. Run series unless the amplifier is rated for the low load.

Not one we can show you. We do not build a sealed enclosure for the American Bass Hawk Slim 12 and American Bass publish no sealed volume for it, so the Performance Graphs tab carries no ported-versus-sealed chart: the only sealed box left to plot would be this cabinet stuffed and sealed, which nobody would build, and a comparison against it would tell you nothing you could buy. What a vented box gives up is the region below tuning, where the cone unloads and the 31 Hz subsonic filter takes over; around 39.0 Hz the vent carries the load and cone travel drops to its minimum, which no sealed alignment can do.

It is a triangular slot in the bottom-rear corner: the floor and the raked back wall are two sides, one bevelled panel is the third. It runs across the cabinet, opens into the box through a 3.12 inch gap at the far end and exits through the side panel as the same triangle. Straight, no bend: 24.13 inches of path and 16.9 square inches of channel running at 21.1 metres per second, 52 percent of its turbulence limit. The three mouth edges are rounded over at 1/2 inch, so the opening at the face is 27.7 square inches and the air leaves it at 12.9 metres per second against the 17.0 threshold where a slot port starts to chuff; the panel's throat end is rounded at 3/8 inch for the same reason. The terminal cup is on the other side.

No, and do not add any. Every sealed Proline X enclosure ships with polyfill; a ported one must not, because damping changes the effective volume the port is tuned against. The port here is cut to 24.13 inches for 39.0 Hz. Stuff it and you move the tuning without shortening the port.

No. This is an enclosure only, cut for the American Bass Hawk Slim 12 specifically: the 10.900 inch cutout, the 3.540 inch mounting depth allowance and the 0.98 cubic foot alignment all come from American Bass's published parameters. It fits both coil versions; the alignment published here is the D4. Bring your own driver.